Rivet drilling machine



Aug. 9, 1932. E. B. STINII;SON I 1,870,429

RIVE'I' DRILLING MACHINE Filed March 13,, 1928 6 Sheets-Sheet 1 r a s I O $1 I I I I I I I a I I i C I I I eg I I I I I I I I I l I M%ZM/W Aug. 9, 1932. E. B. STIMPSON 1,370,429

RIVET DRILLING MACHINE Filed March 15, 1928 e sheets-sheet 2 III A i LLU Aug 9, 1932-. E. B. STIMPSON 1,879,429

RIVEI' DRILLING MACHINE Filed March 15, 1928 6 Sheets-Sheet 3 Aug. 9, 1932.

E. B. STIMPSON RIVET DRILLING MACHINE 1928 6 Sheets-Sheet Filed March 13 x Aug. 9, 1932- E. B. STIMPSON RIVET DRILLING MACHINE Fi led March 13, 1928 6 Sheets-Sheet 5 Aug. 9, 1932. B. STIMPSON 1,870,429

RIYET DRILLING MACHINE Filed March 13, 1928 6 Sheets-Sheet 6 rivet head.

Patented Aug. 9, 1932 STATES" PATENT 'F'FICEL EDWIN B. STIMPSQN, F BROOKLYN, NEW YORK, ASSIGNOR TO EDWIN' B. S'IIJMEE'S018111v COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION, OF NEW YORK.

RIVET DRILLING MACHINE Application filed March 13. 1928. Serial No. 261,228.-

This invention relates to machines for drilling holes in the formation of tubular rivetsand has for its object to provide rapid and accurate means for accomplishing this result without constant labor attendance.

As an aid in upsetting the end of a rivet it has been customary to make a hole or form a. tubular rivet. The larger sizes of rivets can have these holes drilled in them by some ordinary form of chuck or clamping means tional holdingnieans for clamping and accurately centering 1e rivet are mounted close These comprise clamping to the carrier.

jaws for engaging the short shank of the rivet and also an anvil recessed to fit th This additional rivet clamping and centering means, as well as the carrier, are automatically operated. To do away with considerable gearing which would otherwise be necessary for driving the drill at its desirable high speed, separate motor is provided although the drill shifted to and disengage the work in timed relation to the carrier and operation of the additional hold ing means.

Referring to the drawings:

Fig. 1 is a. plan view of the machine.

Fig. 2 is a frontelevation of the machine shown in 1.

Fig. 3 is a leftend elevation of the machine in Fig. 1.

Fig. d is a section on the line d-el of Fig. 2.

Fig. 5 is an enlarged detail carrier shown in l. 7

Fig. 6 is a section on the line 6-6 of Fig. 5.

Fig. 7 is a section on the line 7 of Fig. 1.

Fig. Sis an enlarged section on the line 88 of Fig. 1.

Fig. 9 is an enlarged detail partly in secf the work tion of the anvil and portion of its actuating mechanism.

In Fig. 1 the high speed motorlO (drives, the drill shaft 12 through the belt 11, the.

drill being shown at 13.. The lower speed-r;

motor drives the worm 15 shown in-gFig; 3 which in turn drives the gear -l6:a1 idthrough gears 17 and 18 transmits motion to the shaft 19, on which are keyed thecams 1 0, 21, 22, 23, and 2% for purposes to be discc cussed later. A roller engages cam 2311s.

shown in Figs. 1 and 4, the roller 25 beingv mounted on the lower endof the lever 26 pivoted at 27. The upper end ofthe lever.

agitates, through the pawl and ratchet In echc5 anism illustrated in Fig. 4:, the. rivets from the hopper 28 to properly arrange them for; passage down the chute 29 to the intermit: tently rotated work carrier 31. The lever 26 has its lower end held against the cam 237tby means of the spring 30;

As shown in F ig. thecwork carrier -31 is;. provided with the series of peripheral. notches 32 in which successive rivets are received from the chute 29. Fig. 6shows the -7 carrier 31 as comprising a relatively thin disc secured to its rotary support 33 mounted on the stationary spindle 134k and being-provided with ratchet teeth 35, so that-intermittent rotation is imparted hymeans oftheS-o pawl fi pivoted at 37 on the oscillating-arm; 38 which is also mounted on the spindle For actuating arm 38 the arm;39:;is secured thcreto'as shown in Figs. 5. and 6 and the other end of the arm 39 is provided with ll which islaterally spaced from the carrier 31 and is provided with astationary ring42 for guiding the rivet heads and assisting-in holding the rivets in the carrier. When the. rivets shown in Fig. 5 reach the position of the rivet 43 they are received betweenthe carrier periphery,

.the drilling operation.

clamping jaws 44 and 45 which are also relatively thin and engage the projecting shank of the rivet. The jaws are shaped to clamp and accurately center the rivet for the drilling operation. The jaw 45 is stationary and mounted on the supporting member 46 which is slightly yieldable as is necessary. The other jaw 44 is shiftable with movement of the bar 47 which slides through the stationary spindle as shown in Fig. 6. The other end of the bar 47 is provided with a roller illustrated in Fig. 1 as cooperating with the cam 21 which actuates the clamping jaws. During drilling the rivet head is placed against an abutment or anvil 48 shown in Fig. 9 as being recessed to fit the shape of the rivet'head. Normally the anvil 48 is held withdrawn by the spring 50 but at the proper time, under actuation of the bell 'crank lever 51, against the spring 50, the anvil is moved to the left in Fig. 9 through the hole 49 in the plate 42 into engagement with the rivet head. For actuating the bell crank lever 51 the shiftable member 52 shown in Figs. 8 and 9 is provided with a roller 53 at one end which engages the cam 24 illustrated in Fig. 1. The member 52 is slidable within the stationary guides 61 and a key is provided to prevent rotation of the member 52 within these guides.

After beingdrilled the rivets are moved step by step in the carrier to the lower end of the stationary holding plate 40 where they drop into the space 54 or a lower hopper not shown. I

For shifting the drill 13 a lever 55 pivoted at 56 has one end engaged in the groove of the cam 20 shown in Fig. 1 and its other end received Within the space 57 shown in Fig. 7 so that it may shift the drill 13. The drill" shaft is illustrated as being preferably mounted in ball bearing units to reduce frietion; and to prevent rotation of one of the ball raceway supporting members, a key 58 is slidable in the keyway 59 as the drill 13 is shifted. An extensible joint 60 in the drill shaft permits the shifting of the drill while power is transmitted thereto.

In operation the intermittent rotation of the carrier takes successive rivets from the chute 29 and as each rivet reaches the position 43 shown in Fig. 5 its shank is clamped automatically in the centering jaws. The anvil is then brought up against the rivet heads and the rivet securely held ready for The drill 13 which is continually rotating is then shifted by'its caminto engagement with the rivet and the hole drilled to the desired depth. After this the drill is withdrawn, the anvil also withdrawn and the jaws released permitting the next rivet to be brought into position for drilling. Inasmuch as the cams 2024 inclusive are all mounted on the same shaft and control the drill shifting, operation of the jaws, intermittent rotation of the carrier, actuation of the rivet arranging mechanism below the hopper, and actuation of the anvil, respectively, all of these operations are performed in their proper sequence and in properllyI timed relation to one another.

aving the motor 10 a relatively high speed motor for separately driving the drill 13 does away with the necessity for having any multiplying gearing to actuate the drill at a high speed from the slower speed motor 14 or shaft 19.

I claim: 1. The combination with a cutting tool, of a rotary work carrier, means for feeding the work to said carrier, additional means for holding and centering the work with respect to said cutting tool, means for relatively moving the work and cutting tool for engagement and disengagement, means for releasing the work from said additional holding means, means for subsequently releasing the work from said carrier, and means for actuating each of said means in timed relation to each of said other means, said work carrier comprising a relatively thin rotary disc provided with notches in its periphery for reception of the work and a stationary work retaining means extending over a substantial portion of the carrier periphery close thereto and laterally spaced therefrom on one side.

2. The combination with a cutting tool, of a rotary work carrier, means for feeding the work to said carrier, additional means for holding and centering the work with respect to said cutting tool, means for relatively moving the work and cutting tool for engagement and disengagement, means for releasing the work from said additional holding means, means for subsequently releasing the work from said carrier, and means for actuating each of said means in timed relation to each of said other means, said work carrier comprising a relatively thin rotary disc provided with notches in its periphery for reception of the work and a stationary work retaining means extending over a substantial portion gaging the work.

3. The combination with a cutting tool, of a rotary work carrier, means for feeding the work to said carrier, additional means for holding and centering the work with respect to said cutting tool, means for relatively mov- I ing the work and cutting tool for engagement and disengagement, means for releasing the work from said additional holding means,

means for subsequently releasing the work from said carrier, and means for actuating each of said means in timed relation to each of said other means, a stationary spindle on which said work carrier rotates, a pawl and ratchet mechanism for operating the carrier, said additional holding means comprising a pair of clamping jaws, one of which is shit able, and a bar passing through a hole in said spindle for actuating said shiftable clamping aw.

4. In a mechanism for drilling an axial hole in a rivet, the combination with a rotary drill, of a rivet holding hopper, a relatively thin rotary work carrier provided with peripheral notches, a stationary spindle on which said carrier is mounted, means for intermittently actuating said carrier and including a pawl and ratchet mechanism, a passage supplying said carrier with rivets from said hopper, a stationary member closing said notches throughout a substantial portion of the carrier periphery and located relatively close thereto, said stationary member extending also on one side of the carrier in spaced relation to serve as a stop for the rivet heads, centering and clamping jaws for engaging the rivet shank during stoppage in movement of said carrier, one of said jaws being stationary and slightly yieldable, the other jaw being connected to a shiftable bar passing through said spindle, an anvil shiftable through said stationary member for engagement with the rivet head held by the jaws, means for actuating said anvil, means for shifting the drill toward and from the rivet in cutting a hole in the end of the rivet opposite the anvil while the same is centered by said jaws, a cam for operating each of, the drill shifting means, the jaws, the anvil shifting means, the carrier actuating means, and the rivet arranging means, driving means for said cams and a separate means for driving the drill at a higher speed than the cam driving means.

5. A machine for drilling headed rivets comprising a carrier having a series of notches adapted to engage the shanks of rivets adjacent the heads thereof, means to feed I headed rivets to the notches with their shanks projecting laterally of the carrier and with the ends of the shanks unsupported, means to move the carrier step-by-step to successively advance rivets to a drilling station,

- clamping means at the drilling station operable in a plane parallel to the plane of the carrier to successively clamp the shanks of rivets and hold them in a stationary position independently of the carrier and without removing them from the notches in the carrier, additional clamping means at the drilling station operable to successively clamp the heads of the rivets against the carrier, drilling means mounted for reciprocation in a direction substantially perpendicular to the plane of movement of said-carrienand means operable in timed relation with said-carrier to'move the drilling means-into and out of engagement with rivets clamped at the'dri-ll ing station.

6. A machine for drilling headed; rivets comprising a carrier disc having a series of notches adapted to-engage the shanks'ofrivets adjacent the heads thereof, means to feedI headed rivets to the notches with their'shanks projecting laterally of the carrier disc" and* with the ends of the shanks unsupported, means to move the carrier disc step-by step to successively advance the rivets to drill ing station, clamping means at the drilling. station operable in a plane parallel to the plane of the carrier disc tosuccessively clamp the shanks of the rivets and hold the rivets stationary independently of the carrier disc and without removing the rivets-from said notches, additional clamping means operable" to successively clamp the heads of the rivets against the carrier disc at the drillingz'station, a drill, means operable intimed relation with said carrier disc to move the drill into and out of engagement with the rivets clamped at the drilling station, means operable from one source of power to rotate the drill, and means operable from a separate source of power to ellect the other movements of the machine.

7. A machine for drilling headed rivets comprising a thin carrier disc mounted for rotation on a substantially horizontal axis, said disc having its periphery provided with a series of notches adapted to engage the shanks of rivets adjacent the heads thereof; means to feed headed rivets to the notches with their shanks projecting laterally of said disc; means to move the disc step-by-stepto successively advance rivets to a drilling station; a guide extending circumferentially of the disc and adjacent its periphery from adjacent the point where the rivets are fed to the disc to a point beyond the drilling station, said guide acting to prevent the rivets from leaving the disc by movement radially of the disc; shank clamping means at the drilling station operable to clamp the shanks of the rivets and hold them in a stationary position independently of the carrier disc and without removing them from said notches; a drill mounted for reciprocation along a substantially horizontal axis; and means operable in timed relation with said carrier disc to move the drill into and out of engagement with the rivets clamped at the drilling station.

8. A machine for drilling headed rivets comprising a carrier disc mounted for rotation on a substantially horizontal axis, said disc having its periphery provided with a series of notches adapted to engage the shanks of rivets adjacent the heads thereof; means to feed headed rivets to the notches with their shanks projecting laterally of said disc;

means to rotate the disc step-by-step to suecessively advance rivets t0 the drillin station; a guide extending circumferentially of the disc and adjacent its periphery from adj acent the point Where the rivets are fed to the disc to a point beyond the drilling station, said guide acting to prevent the rivets from leaving the disc by motion radially thereof guide means extending adjacent the path of the heads of the rivets to prevent the rivets from leaving the disc by motion laterally thereof; a pair of clamping jaws at the drilling station operable to clamp the shanks of the rivets and hold them in a stationary position independently of the carrier disc and without removing them from said notches; additional clamping means at the drilling station operable to clamp the heads of the rivets against the carrier disc; a drill mounted for reciprocation along a substantially horizontal axis; and means oper able in timed relation With said carrier to move the drill into and out of engagement with the rivets clamped at the drilling station.

In testimony whereof I aiiix my signature.

EDWIN B. STI MPSON. 

